I have yet to crack open a Hydrogear transmission in the past 5 years. Every brand I sell uses a hydrogear tranny in the line up somewhere or another. Even Ferris is using the ZT5400 in the new 2100Zs this year. They have been out for 3-4 years now and have been proven super reliable. The zt3400 have the same track record. I have no problem in looking a customer in the eye and putting a handshake to saying that the hydrogear trannys are reliable and will be pretty much trouble free with proper servicing. This is honestly a non-issue